ea526196f4
This replaces WeakFactory with FinalizationGroup. New API is here: https://weakrefs.netlify.com/ BUG=v8:8179 Change-Id: I8c1c4a70deb42581d17117423dd29d93bdd35cb0 Reviewed-on: https://chromium-review.googlesource.com/c/1435938 Reviewed-by: Maya Lekova <mslekova@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org> Commit-Queue: Marja Hölttä <marja@chromium.org> Cr-Commit-Position: refs/heads/master@{#59204}
89 lines
2.4 KiB
JavaScript
89 lines
2.4 KiB
JavaScript
// Copyright 2018 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --harmony-weak-refs --expose-gc --noincremental-marking
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let cleanup_call_count = 0;
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let cleanup = function(iter) {
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if (cleanup_call_count == 0) {
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// First call: iterate 2 of the 3 holdings
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let holdings_list = [];
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for (holdings of iter) {
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holdings_list.push(holdings);
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// Don't iterate the rest of the holdings
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if (holdings_list.length == 2) {
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break;
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}
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}
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assertEquals(holdings_list.length, 2);
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assertTrue(holdings_list[0] < 3);
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assertTrue(holdings_list[1] < 3);
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// Update call count only after the asserts; this ensures that the test
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// fails even if the exceptions inside the cleanup function are swallowed.
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cleanup_call_count++;
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} else {
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// Second call: iterate one leftover holdings and one holdings.
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assertEquals(1, cleanup_call_count);
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let holdings_list = [];
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for (holdings of iter) {
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holdings_list.push(holdings);
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}
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assertEquals(holdings_list.length, 2);
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assertTrue((holdings_list[0] < 3 && holdings_list[1] == 100) ||
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(holdings_list[1] < 3 && holdings_list[0] == 100));
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// Update call count only after the asserts; this ensures that the test
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// fails even if the exceptions inside the cleanup function are swallowed.
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cleanup_call_count++;
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}
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}
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let fg = new FinalizationGroup(cleanup);
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// Create 3 objects and register them in the FinalizationGroup. The objects need
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// to be inside a closure so that we can reliably kill them!
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(function() {
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let objects = [];
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for (let i = 0; i < 3; ++i) {
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objects[i] = {a: i};
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fg.register(objects[i], i);
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}
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gc();
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assertEquals(0, cleanup_call_count);
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// Drop the references to the objects.
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objects = [];
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})();
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// This GC will reclaim the targets.
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gc();
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assertEquals(0, cleanup_call_count);
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let timeout_func_1 = function() {
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assertEquals(1, cleanup_call_count);
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// Assert that the cleanup function won't be called unless new targets appear.
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setTimeout(timeout_func_2, 0);
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}
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setTimeout(timeout_func_1, 0);
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let timeout_func_2 = function() {
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assertEquals(1, cleanup_call_count);
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// Create a new object and register it.
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let obj = {};
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let wc = fg.register(obj, 100);
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obj = null;
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gc();
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setTimeout(timeout_func_3, 0);
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}
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let timeout_func_3 = function() {
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assertEquals(2, cleanup_call_count);
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}
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